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Measuring device for sound collection range of communication terminal

A sound pickup and communication terminal technology, which is applied in telephone communication, electrical components, branch office equipment, etc., can solve the problems of inaccurate testing, inability to measure sound pickup intensity at different distances, and inability to calibrate near-end sound, so as to achieve accurate measurement Effect

Inactive Publication Date: 2012-09-26
南京声准科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are several defects in doing so. First, it is impossible to measure the sound pickup intensity at different distances; second, the measurement results are inaccurate, because the signal processing algorithms in some communication terminals need to measure the sensitivity of multiple microphones in real time. Calibration, but this calibration usually needs to have the desired near-end sound, such as the voice of the mobile phone user's own mouth, as a reference, so there is no desired near-end sound, which will cause calibration or inaccurate calibration, so that the test will not be accurate. accurate and unstable

Method used

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  • Measuring device for sound collection range of communication terminal
  • Measuring device for sound collection range of communication terminal
  • Measuring device for sound collection range of communication terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Such as figure 1 Shown:

[0016] The measurement device for the sound pickup range of the communication terminal is mainly composed of a turntable, an artificial head, a wireless comprehensive tester and an antenna, a terminal to be tested, a speaker, a front end and a computer; the terminal to be tested is set on the artificial head; the artificial head is equipped with an artificial mouth; The head includes the terminal to be tested and is placed on the turntable; the computer is connected to the front end; the front end includes a multi-channel sound card, a near-end sound card, a signal acquisition component, and a control component; The components are connected to the turntable, the front-end near-end sound card is connected to the artificial mouth, and the terminals to be tested include mobile phones, etc.; the turntable can automatically adjust the speed; the terminal to be tested is connected to the wireless comprehensive tester through cables or antennas (wirel...

Embodiment 2

[0027] Such as figure 2 Shown:

[0028] The setting and testing process is the same as above, the difference is:

[0029] Place multiple speakers in different directions and distances, that is, at different distances and heights from the terminal to be tested, to measure the sound pickup intensity at different distances; in this example, there are 3 speakers.

Embodiment 3

[0031] Such as image 3 Shown:

[0032] The setting and testing process are the same as in Example 1, the difference is:

[0033] A horn is placed on a moving mechanism, and the moving mechanism is placed on a guide rail and can run along the guide rail. The guide rail and the terminal to be tested are on the same plane, and the distance from the horn to the terminal to be tested is from far to near or from near to far; The computer automatically controls the distance between the speaker and the artificial head by controlling the operation of the braking mechanism on the guide rail, so as to measure the sound pickup intensity at different distances.

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Abstract

The invention relates to a measuring device for the sound collection range of a communication terminal. Loudspeakers are arranged on the other side of a terminal to be measured; the terminal to be measured and an artificial mouth are arranged on an artificial head; and the artificial head is arranged on a rotating platform. The measuring device overcomes the defects that the conventional measurement of a sound collection range is centered on the directivity, the collection intensity of sounds in different distances cannot be measured owing to playing a single sound, and the result of the measurement is inaccurate. The measuring device measures the sound collection range of the terminal to be measured, so as to provide effective, impersonal and accurate measurement of the sound collecting range, accurately measure the sound collection range of the terminal to be measured, and ensure accurate, effective and impersonal measurement of the sound collection range.

Description

technical field [0001] The invention relates to a communication terminal sound pickup device, in particular to a communication terminal sound pickup range measurement device. Background technique [0002] The multi-microphone noise cancellation solution has been applied by more and more communication terminals such as mobile phones. The advantage of the multi-microphone noise cancellation solution over the single-microphone noise cancellation is that the multi-microphone noise cancellation has a clear pickup range, that is, in a certain direction and distance. The sound picked up inside is stronger, while the sound picked up in places outside these directions and distances is weaker. With this pickup range, the desired sound can be picked up, and the unwanted sound can be eliminated, so as to achieve the effect of noise cancellation. Therefore, testing its pick-up range is a very important indicator of a communication terminal, especially for a communication terminal with a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/24H04M1/725
Inventor 张铭林松蓝晖
Owner 南京声准科技有限公司
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